The case is a classic 38.5 mm of finely polished gold on the top and a brushed circumference around the side. Three recessed pushers are evident on the left circumference of the case at 8, 9 and 10 o’clock; a fourth is visible at 4 o’clock. These are for advancing the calendar displays either collectively or independently. The case is a rather slim 10.2 mm thick. The dial is black solid-silver. There’s a lot of careful geometry here. The rhodium-gold appliques are on a raised portion of the dial, which cuts around the four subdials of months, leap year, seconds and days. There are a couple circumscribed subdials in there as well. The seconds share space with the moonphase and a day/night indicator shares the day subdial. Per classic Langematik fashion, the outsize date is right under XII. If we take a magnifier to this dial, we’ll find perfect printing – be it on flat surface or on the circular graining of the sub dials. The subtle geometric pleasantries are very gratifying up close. The day/night indicator avoids the circular graining on the day hours. The lanced hands are lumed. Four and eight o’clock aren’t numerals. The moonphase is a striking shade of blue – and it also deviates from the true position of the moon by a mere one day every 122.6 years.

This brings us to mechanics. The first thing one notices when gazing through the sapphire case back is the 21-carat gold rotor. But look closer, yes, closer still. The centrifugal mass on this rotor is labeled Platin – need we translate? Das ist cool. The Sax-0-Mat caliber is no stranger to patents. The Langematik Perpetual indeed has Lange’s patented Zero-Reset mechanism. When pulling the crown, the seconds hand jumps to the zero position, making synchronization simple. Can you say efficiency? This rotor can wind the Sax-0-Mat to a 46-hour reserve. That’s 46 hours that you can just sit there, staring at the ribbed three-quarter plate of untreated German silver, or admiring the hand-engraved balance cock near that classic screw balance. Whatever your fancy is, after you set the Langematik Perpetual, it’ll only need correction once every 100 years. Be sure to pass along this instruction to your heirs.

Lange will offer this model in black-on-black, hand-stitched crocodile, which is the bolder stately look. The Langematik Perpetual was Lange’s first self-winding wristwatch with a perpetual calendar and outsize date. This new version surely lives up to that original endeavor – if not over-delivers.

So, there you have it. Today, the first A. Lange & Söhne boutique in Moscow will be inaugurated, and this exclusive Langematik Perpetual in white gold with black dial will be unveiled. Retail will be $84,200 USD.